Actuating means for dumping concrete-mixers.



J. M. BRUNS.

ACTUATING MEANS FOR DUMPING CONCRETE MIXERS.

APPLICATION ILED FEB. 14, 1910.

LMQ QQSO Patented May18,1915.

4 SHEETS-SHEET1.

THE NORRIS PETERS CO.. FHOYC-LITHQ, WASHINGTON. D. C.

Jx IVI. BRUNS.

ACTUATING MEANS FOR DUIVIPING CONCRETE IVIIXERS.

APPLICATION FILED FEB. I4, I910.

4 SH EETS-SHIZET 2.

Patente May 18, 1915.

THE NORRIS PETERS 50., FHOTOVLITHOY, WASHINGTON. D. c.

J. M. BRUNS.

ACTUATING MEANS FOR DUMPING CONCRETE MIXERS.

APPLICATION FILED FEB. 14. 1910.

LEQQQQSO Patented May 18, 1915.

4 SHEETSSHEET 3.

ya. l/q

THE NORRIS PETERS C(L. PHOTG-LITHQ, WASHINGTON, D, C

J. M. BRUNS.

ACTUATING MEANS FOR DUMPING CONCRETE MIXERS.

,APPLICATION FILED FEB. 14, 1910.

1 149 2989 Patented May 18, 1915.

4 SHEETSSHEET 4.

THE NORRIS PETERS CO.. PHOTO-LITHO WASHINGION. D. C,

UNFTEE @TATEg PATENT FFllQE.

JOHN M. BRUNS, OF WATERLOO, IOVJ'A, ASSIGNOR TO VVATERLOO CEMENTMACHINERY CORPORATION, OF \VATERLOO, IOWA.

ACTUATING MEANS FOR DUI/[PING CONCRETE-MIXERS.

raaaee.

Application filed February 14, 1910.

To all whom it may concern:

Be it known that 1, JOHN M. BRUNs, a citizen of the United States ofAmerica, residing at Waterloo, in the county of Blackhawk and State ofIowa, have invented certain new and useful Improvements in ActuatingMeans for Dumping Concrete- Mixers, of which the following is adescription.

In rotary concrete mixers and like mechanisms of certain types, it isnecessary after the mix has been properly prepared to dump or tilt themixing chamber so as to discharge the contents thereof, after which thechamber is returned to its normal operating position. My invention isadapted for use on devices of this kind and is shown as applied to arotary concrete mixer of well known form, it being understood that itmay be used wherever found applicable.

My invention has among its objects the production of a simple,satisfactory and efficient device of the kind described that may bemanufactured at comparatively small cost.

It is designed to accomplish the discharging operation with the minimumpower and the same consists of the novel construction, arrangement andcombination of parts herein shown and described and more particularlypointed out in the claims.

In the drawings wherein like reference characters indicate like orcorresponding parts, Figure 1 is a partial side elevation of a concretemixer equipped with my improved device, Fig. 2 is a front view of thesame showing the parts in their normal operating position, Fig. 3 is asimilar view showing the mixing chamber tilted to discharge itscontents, Fig. 4: is a detail View of the preferred form of lever used,Fig. 5 is a fragmentary view showing the preferred means of adjustingthe position of the pivotal point at which the lever is connected to thesupporting frame of the champer, Fig. 6 is a sectional viewsubstantially on line 6-6 of Fig. 5, Fig. 7 is a side view illustratingthe manner of connecting the lower end of the preferred form of lever toa fixed part of the supporting frame, Fig. 8 is a section substantiallyon line 88 of Fig. 7, and Fig. 9 is a side elevation of a Specificationof Letters Patent.

Patented liiay 15, 1915.

Serial No. 543,865.

device showing a modification of the operating lever.

1n the drawings, 1 is a supporting frame or standard.

2 is a main supporting frame for the mixlng chamber, pivotally connectedto the frame 1 at 3.

4 is the mixing chamber provided with a circumferential cog ring 5 whichis engaged with and operated by driving gears (not shown) in the usualwell known manner, to rotate the chamber.

6 is the receiving hopper and 7 the discharge spout.

As shown, the whole device is mounted upon a suitably formed truck 8 forcon venience in transportation.

As shown in Figs. 1 to 8 inclusive, the operating lever 9 is pivotallyconnected to the frame or standard 1 as at 10, which serves as thefulcrum, and is also pivotally connected to the horizontal frame 2 as at11. The said lever is provided with a longitudinal slot 12 which isextended at its lower end at substantially a right angle on the upperside of the lever so that when the chamber is in its operative position,as shown in Fig. 1, the pivotal stud 10 is positioned in said slot asindicated, the lever being preferably so formed that gravity issuflicient to engage the parts as illustrated, and thus lock them inposition to prevent accidental disengagement. The upper part of thelever, as at 14, may be of lighter material and detachable from the mainlever 9.

In operation the operator seizes the lever 14 and in the initialmovement of pressing the same down lifts the lower end of the lever 9moving the pivotal stud 10 out of engagement with the extension and inline with the longitudinal slot 12 and contacting with the lower side ofsaid slot. Further pressure causes the operating chamber to tilt uponits pivotal center 3, and as the frame 2 carrying the lever 9 movesdownward it also carries the lever 9 with it, causing the pivot 11 tomove toward the fulcrum point 10, the slot 12 permitting such an action.The result of this action is to move the weight point 11 toward thefulcrum point 10, reducing the distance between the two and greatlyincreasing the leverage. This is important in view of the fact that theinitial movement requires comparatively little power While as thechamber tilts it re- 5 quires more power until finally the mix movestoward the discharge spout 7 by force of gravity and is dischargedthrough said spout 7 substantially as shown in Fig. 3. After this isdone the reverse action causes 10 the parts to assume the normaloperative position shown in Fig. 1.

In order to secure the reliable locking of.

the parts in operative position as explained,

at the moment the frame 2 is substantially in horizontal position tosecure the most satisfactory operation of the device, care is necessaryto fix the position of the pivotal point 11. This point may be in theform of a stud, or as shown, may be secured by a suitable bolt passingthrough the side of the frame 2. This will require the boring of asuitable hole for said bolt after the parts have been trued up and thepoint exactly fixed. As a means for simplifying this operation means maybe employed for securing an adjustment of this pivot, the meanspreferred being clearly shown in Figs. 5 and 6. As here shown, theframe2 as made is provided with bolt holes for the receipt of bolts15-15, and a plate 16 is provided having bolt holes'therein constructedto register with the same. The plate is formed with a boss 17 offsetfrom the center of the plate and having formed therein a suitable bolthole to receive the bolt 18, which extends through the lever 9 as shown.By disengaging the bolts 15 the plate 16 may be turned a quarter ormore, which will to the extent named adjust the distance between thepivotal bolt 18, corresponding to the pivotal point 11 shown in Fig. 1,and the pivotal point 10 engaging the lower end of the lever. In shoppractice this is found to be a convenient means for constructing theparts so that they may be readily assembled without the necessaryexpense and time of measuring the distance between the two pivotalpoints and later boring a hole, for the pivotal bolt.

As shown in Fig. 9, the reverse construction is illustrated in which thelower end of the lever is pivotally engaged with the pivot 10 by asuitable bolt passing through a corresponding hole in the end of thelever and the slot 12 is formed in the upper part of the lever with thepivot 11 engaged therewith. The right angular extension of the slot 12is formed at the upper end of the slot and on the lower side thereof,while a spring 20 or equivalent means engaging the lever at one end anda fixed part of the device at the other, as shown, tends tonormally holdthe lever in its highest position, as shown in Fig. 9, to engage thepivot 11 with the transverse extension of said slot,

thus locking the parts together temporarily as before. The 7 initialmovement of the lever '14: detaches the pivot 11 from said notch, thepivot 10 acting as, the fulcrum. The weight pivot 11 moves along theslot 12 toward the pivot 10, the weight and fulcrum being relativelybrought nearer to each other as the operation proceeds as before andwith the same effect.

It is obvious that after having described my invention variousmodificationsrnay be made without departing from the spirit thereof, andhence'I do not desire to be understood as limiting myself to the, exactdevice in which my improvement is shown or the details and partsthereofv as illustrated.

What I claim as new and desire to secure by Letters Patent is: I

1. In a device of the kind described and in combination, a supportingframe, a tiltable member pivotally supported on a substantiallyhorizontal lineon the supporting frame, and means formovingsaid-tiltable member, said means consisting of a lever having atone end a sliding pivotal connection with the supporting frame, and at apoint intermediate of its ends also pivotally connectedto the tiltingmember, said lever being provided with a longitudinal slot in which oneof said pivots is positioned, and the other pivot being in fixedrelation to the lever regarding movement longitudr nally of the lever,whereby upon operating the lever the fulcrum and weight are caused toapproach each otherto modify the,oper. ative power required. 7 V I 2. Ina device of the kind described, and in combination, a supporting frame,a member pivotally supported in .said. frame for tilting movement abouta horizontal: axis and meansfor tilting said member comprising a leverhaving a connection at one end with the supporting frame at a pointbelow the pivotal connection of the tiltable member with the supportingframe, and said lever also having a connection with the. tilting memberbelow "the pivotal connection of the tilting member with the frame, bothof said lever connections being positioned at the same. side of avertical plane passing through the pivot of the tilting member, one ofsaid lever connections being a pivotal sliding connection, and the otherof said lever connections being a fixed pivotal connection, whereby uponoperating the lever the fulcrum and weight are caused to approach eachother to modify the operative power required.

3. In a device of, the kind described and in combination, a supportingframe, a tiltable member pivotally supported on a .substantiallyhorizontal line on. the supporting frame, and means for moving saidtiltable member, said means consisting of a lever having at one end asliding pivotal connection with the supporting frame, and at a uponoperating the lever the fulcrum and point intermediate of its ends alsopivotally Weight are caused to approach each other to connected to thetilting member, said lever modify the operative power required. beingprovided with a longitudinal slot in In testimony whereof I havehereunto 5 which one of said pivots is positioned, said signed my namein the presence of two sub 15 slot having an angular extension in linewith scribing witnesses.

the said pivot when the parts are in opera- JOHN M. BRUNS tive position,and the other pivot being fixed Witnesses: to the lever respectingmovement of the ROY W. HILL,

10 same longitudinally of the lever, whereby CHARLES I. COBB.

Gopies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents.

Washington, D. G.

